Concrete railway-tie.



H. GEBHARDT. CONCRETE RAILWAY TIE. APPLICATION FILED D130. 6, 1910Patented June 24, 1913.

FiG..r

HEINRICH GEBHARDT, OF MUNICH, GER-MANY.

CONCRETE RAILWAY-TIE.

To all whom it may concern Be it known that I, HEINRICH Gnnrmnn'r, asubject of the King of Saxony, residing at Munich, in the Kingdom ofBavaria, German Empire, have invented a new and use ful Improvement inConcrete Railway-Ties; and I do hereby declare the following to be afull, clear, and exact description of the same.

The present invention relates to a railway tie or sleeper of concreteprovided with pockets in the concrete, said pockets having inclinedsides and becoming wider toward the bottom and being adapted to receiveand engage the rail clamping members (bolts and key-blocks). In order tofacilitate the insertion and removal of said railclamping members, eachpocket is provided at its end with a suitably shaped recess.

The advantages of the present invention consist in the possibility ofremoving and replacing any one of the rail-clamping members on accountof deterioration, such as bolts, key-blocks and press-plates, withoutlifting the rail or in any way disturbing the concrete sleeper. In thisway the sleeper can be kept indefinitely intact and the cost of up-keepis greatly reduced.

Reference being had to the accompanying drawing, Figure 1 is aperspective View of the clamping device seen from above; Fig. 2 is aperspective view of one end of the sleeper, showing two pockets; Fig. 3shows a modified form of Fig. 2; Fig. 4 is a section along the line abof Fig. 1; Fig. 5 is a sec tion along the line 0-cl of Fig. 4; Fig. 6shows a member adapted to prevent the lateral shifting of bolts whichhave become loose; Fig. 7 is a modified form of Fig. 6, the member beinghere provided with a specially formed head plate for engaging thebase-flange of the rail; Fig. 8 shows a plate adapted to receive thepressure of the member shown in Figs. 6 and 7. By using plates ofdifferent thicknesses, the gage may be varied to a certain degree in oneand the same size of sleeper. Fig. 9 shows a pressure plate, adapted toreceive the pressure of the head of the clamping bolt; Fig. 10 shows aclamping bolt.

The pockets 3, 4, 8, 7, 5 of Fig. 2 and 3, 4, 8, 7, of Fig. 3 areadapted to contain the bolt D and in part also the members Fig. 6 andFig. 7. In order to facilitate the insertion and removal of the bolt D,each Specification of Letters E'atent.

Application filed December 5, 1910.

Patented June 24, 1913. Serial No. 595,742.

pocket has at its end an enlarged recess 1, 2,

6, 7 of Figs. 2 and 3.

In the form of construction according to Fig. 2 the sleeper contains twoseparate pockets for each rail; in Fig. 3 these pockets, are elongatedtill they meet and form one single groove, having an enlarged recess ateither end.

The clamping of the rail to the sleeper is accomplished as follows:After the pressure plates E, Fig. 9, have been inserted in the pocketsof the sleeper, the recessed baseplate B B, Fig. 1, is placed inposition above said pockets; the pressure plates E are each providedwith a foot so that they will remain erect in the desired position. Thebolt D, Fig. 10, is then inserted into the enlarged recess 1, 2, 6, 7 ofFig. 2 or 3 and pushed along the pocket against the baseplate B. Thespace remaining between the bolt D and the wall 6 of Fig. 2 or 3 is thenfilled out with the help of the members C, Fig. 6, C, Fig. 7, and F andF, Fig. 1, the member F being provided with a lug engaging under themember C. It is now only necessary to screw the nut onto the bolt and totighten the same, whereupon the rail is securely clamped to the sleeper.An elastic plate B may also be placed directly on the surface of thesleeper in order to deaden the concussion. The length and section of thepockets 3, 4, 8, 7, 5 of Fig. 2 and 3, 4, 7, 8 of Fig. 3, and of therecesses 1, 2, 6, 7 of Figs. 2 and 3 may be varied as desired.

That I claim as my invention, and desire to secure by Letters Patent,is:

1. In combination, a concrete sleeper having formed therein a holehaving a dovetailed recess formed directly in the concrete itself, ascrew-bolt having a dove-tailed head adapted to be received in saidrecess; exchangeable supporting plates interposed between said head andthe concrete, and lateral inserts inserted in said hole to prevent thebolt head from leaving the recess.

2. In combination, a concrete sleeper having therein a T-shaped pocketcomprising a transverse hole and a longitudinal undercut dove-tailedrecess communicating therewith; a screw-bolt having a dove-tailed headadapted to be loosely inserted in said recess. and substantiallyconforming in shape thereto; a flanged rail on said sleeper; movableplates disposed between the inclined sides of said recess and head; a Intestimony whereof, I have signed my Washer member on said bolt andengaging name to this specification in the presence of 19 over theflange of the rail and having an two subscribing Witnesses. z

extension en a ino in said holea fillin member in s id h dle and havinga lug er?- HEINRICH GEBHARDT gaging under said extension; and an addi-WVitnesses:

tional member between the filling member -AVERE W. COTTER,

and the wall of the hole. MATHILDE K. HELD.

Copies of this patent may be obtained. for five centseach, by addressingthe Commissioner of Patents,

Washington, I). C.

